Figure 2. Single cell imaging immediately after injection of XPA-1 red fluorescent protein (RFP) human pancreatic cancer cells into the common bile duct. RFP human pancreatic tumor cells can be imaged within the common bile ducts and pancreatic ducts using the OV100 imaging system. Inset, magnified view of the major pancreatic duct (mPD), common bile duct (CBD), and hepatic duct (HD).